EP2713025B1 - Structure d'admission d'air pour moteur à combustion interne - Google Patents

Structure d'admission d'air pour moteur à combustion interne Download PDF

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Publication number
EP2713025B1
EP2713025B1 EP11865633.9A EP11865633A EP2713025B1 EP 2713025 B1 EP2713025 B1 EP 2713025B1 EP 11865633 A EP11865633 A EP 11865633A EP 2713025 B1 EP2713025 B1 EP 2713025B1
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EP
European Patent Office
Prior art keywords
air intake
capture member
compressor impeller
internal combustion
ice clump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11865633.9A
Other languages
German (de)
English (en)
Other versions
EP2713025A1 (fr
EP2713025A4 (fr
Inventor
Osamu Igarashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
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Toyota Motor Corp
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Publication date
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Publication of EP2713025A1 publication Critical patent/EP2713025A1/fr
Publication of EP2713025A4 publication Critical patent/EP2713025A4/fr
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Publication of EP2713025B1 publication Critical patent/EP2713025B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F02B39/16—Other safety measures for, or other control of, pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M13/022—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure using engine inlet suction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/06—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding lubricant vapours
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/08—Air cleaners with means for removing dust, particles or liquids from cleaners; with means for indicating clogging; with by-pass means; Regeneration of cleaners
    • F02M35/088—Water, snow or ice proofing; Separation or drainage of water, snow or ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10262—Flow guides, obstructions, deflectors or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M2013/027—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with a turbo charger or compressor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/0212—Multiple cleaners
    • F02M35/0216—Multiple cleaners arranged in series, e.g. pre- and main filter in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
    • F02M35/044—Special arrangements of cleaners in or with respect to the air intake system, e.g. in the intake plenum, in ducts or with respect to carburettors
    • F02M35/046—Inline cleaners, i.e. the cleaner being arranged along the length of a wall of a pipe or manifold
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an air intake structure for an internal combustion engine where a compressor impeller of a turbocharger is disposed at an air intake passage of the internal combustion engine.
  • unburned air-fuel mixture and a burned combustion gas may leak from an combustion chamber into a crankcase through a gap between a cylinder and a piston.
  • PCV Positive Crankcase Ventilation
  • the blow-by gas is recirculated to an air intake pipe through a PCV valve (flow control valve) and a PCV hose (blow-by gas passage).
  • the PCV hose is coupled to the air intake pipe at one end portion.
  • moisture included in the blow-by gas may freeze near the coupling portion of the PCV hose at an inner wall surface of the air intake pipe. This frozen moisture may grow into a large ice clump.
  • the ice clump may collide with the compressor impeller of the turbocharger disposed downstream side of the air intake pipe. Especially, it is not preferred that a large ice clump collide with a thin-walled vane formed at the compressor impeller.
  • Patent Literature 1 forming a plurality of depressed portions in sections on the inner wall surface of the air intake pipe prevents a large ice clump from appearing on the inner wall surface of the air intake pipe.
  • PATENT LITERATURE 1 Japanese Unexamined Patent Application Publication No. 2009-281317
  • DE 4118265 to Volkswagen AG discloses an automotive power unit comprising an internal combustion (IC) engine with a pressure-charger (11), particularly of the spiral type, between it and an air intake.
  • IC internal combustion
  • 11 pressure-charger
  • Patent Literature 1 is a technique that prevents a large ice clump from appearing on an inner wall surface of an air intake pipe. This allows the large ice clump not to collide with a compressor impeller of a supercharger, especially, a vane of the compressor impeller.
  • the present invention does not aim to prevent an ice clump from appearing on an inner wall surface of an air intake passage in an air intake structure for an internal combustion engine where a compressor impeller of a turbo supercharger is disposed in an air intake passage of the internal combustion engine, but aims to prevent an ice clump from colliding with the compressor impeller when the ice clump appearing on the inner wall surface of the air intake passage peels off.
  • the present invention is an air intake structure for an internal combustion engine that includes a compressor impeller of a turbo supercharger and a capture member.
  • the compressor impeller of the turbo supercharger is provided in an air intake passage of the internal combustion engine.
  • the capture member is provided upstream side with respect to the compressor impeller in the air intake passage.
  • the capture member is configured to capture an ice clump formed at an inner wall surface of the air intake passage when the ice clump peels off.
  • the capture member is configured as a filter that allows air sucked in the air intake passage to pass through and prevents the ice clump from passing through.
  • the capture member (filter) made of resin material provides a lower coefficient of thermal conductivity compared with the case where the capture member is made of metallic material. Thus, the clogging of the capture member is less likely to occur due to freezing of the ice clump and the moisture in contact with the capture member.
  • a blow-by gas passage may be coupled to the air intake passage at an upstream side with respect to the capture member and is configured to introduce a blow-by gas in a crankcase of the internal combustion engine.
  • blow-by gas is specified as a factor that makes the ice clump. Accordingly, it is obvious that if an intake air temperature in the air intake passage is low, moisture included in the blow-by gas introduced from the crankcase to the air intake passage through a blow-by gas passage freezes near the coupling portion with blow-by gas passage at the air intake passage.
  • the capture member is provided extending radially inward from an inner wall surface of the air intake passage.
  • the capture member is an annular member including a hole at a center portion of the air intake passage.
  • the hole passes through in a center axis direction.
  • the hole includes a peripheral edge that projects toward an upstream side in an intake airflow direction.
  • the capture member may have a diaphragm-shaped outline.
  • the capture member is formed in a circular plate shape.
  • the capture member includes the circular hole at the center portion. The peripheral edge of the circular hole gradually projects toward the upstream side of the intake air flow direction.
  • the capture member is not installed in the entire region radially in the middle of the air intake passage, and the capture member is an annular member extending radially inward from the inner wall surface of the air intake passage. That is, since the center portion of the capture member is open, an intake air resistance in the air intake passage is reduced compared with the case where the center portion is not open. Thus, the pressure loss of the intake air is reduced.
  • the ice clump is less likely to pass through the hole. This is because, in the case where the compressor impeller of the turbo supercharger is disposed at the air intake passage, swirl flow is generated along the inner peripheral surface of the air intake passage in association with the rotation of the compressor impeller. That is, when the ice clump that peels off is transported to the upstream side of the capture member by an intake airflow, the ice clump goes through the inner peripheral surface of the air intake passage and contacts the outer peripheral portion of one side surface of the capture member (surface at the upstream side in the intake airflow direction) by the swirl flow and is stopped. Meanwhile, the intake airflow passes through the inside of the capture member formed of a filter.
  • the peripheral edge of a circular hole projects toward the upstream side in the intake airflow direction, the ice clump captured by the capture member is prevented from going beyond the capture member from the circular hole of the capture member to the downstream side. This reduces a possibility for the ice clump to pass through the capture member.
  • the capture member is provided so as to extend radially inward from an inner wall surface of the air intake passage.
  • the capture member may have a diaphragm-shaped outline.
  • the capture member may be disposed at the lower half region in the vertical direction or disposed at the lower one-third region in the vertical direction in the air intake passage.
  • the capture member is not installed in the entire region radially in the middle of the air intake passage, and the capture member extends radially inward from the inner wall surface of the air intake passage. That is, since the center portion of the capture member is open, an intake air resistance in the air intake passage is reduced compared with the case where the center portion is not open. Thus, the pressure loss of the intake air is reduced.
  • the ice clump is less likely to pass through the open part. This is because, in the case where the compressor impeller of the turbocharger is disposed at the air intake passage, swirl flow is generated along the inner peripheral surface of the air intake passage in association with the rotation of the compressor impeller. That is, when the ice clump that peels off is transported to the upstream side of the capture member by an intake airflow, the ice clump goes through the inner peripheral surface of the air intake passage and contacts the outer peripheral portion of one side surface of the capture member (surface at the upstream side in the intake airflow direction) by the swirl flow and is stopped. Meanwhile, the intake airflow passes through the inside of the capture member forming a filter.
  • the present invention does not prevent an ice clump from appearing on an inner wall surface of an air intake passage in an air intake structure for an internal combustion engine where a compressor impeller of a turbocharger is disposed in the air intake passage of the internal combustion engine, but prevents this ice clump from colliding with a compressor impeller, especially, a vane of the compressor impeller when an ice clump appearing on the inner wall surface of the air intake passage peels off. This allows protecting the compressor impeller, thus achieving stable functionality of the turbocharger itself over the long term.
  • FIG. 1 to FIG. 3 illustrate one embodiment according to the present invention.
  • An exemplary engine 1 illustrated in this embodiment is, for example, an inline four-engine.
  • a cylinder head (not shown) of the engine 1 includes an intake manifold 2 and an exhaust manifold 3.
  • the intake manifold 2 distributes and supplies an incoming air to respective cylinders.
  • the exhaust manifold 3 collects exhaust gas discharged from the respective cylinders.
  • An air intake pipe 4 to take air from the atmosphere is coupled to the intake manifold 2.
  • This air intake pipe 4 includes an air cleaner 6 at the inlet.
  • the intake manifold 2 and the air intake pipe 4 constitute an air intake passage.
  • the intake manifold 2 includes a throttle valve 7 to adjust the incoming air quantity of the engine 1 at the upstream side in the intake airflow direction.
  • this throttle valve 7 is actuated by a throttle motor and an Electronic Control Unit (ECU).
  • ECU Electronic Control Unit
  • an exhaust pipe 5 is coupled to the exhaust manifold 3.
  • a catalyst 9 to purify an exhaust gas is installed at the downstream side of the exhaust pipe 5.
  • the exhaust manifold 3 and the exhaust pipe 5 constitute a part of the exhaust passage.
  • the engine 1 is equipped with a turbocharger 20.
  • This turbocharger 20 is to supercharge the incoming air into the engine 1 using exhaust pressure.
  • This turbocharger 20 includes a turbine wheel 21 and a compressor impeller 22, or similar member.
  • the turbine wheel 21 is disposed inside of a turbine housing 24, which is disposed between the exhaust manifold 3 and the exhaust pipe 5 (in the middle of the exhaust passage).
  • the compressor impeller 22 is disposed in a compressor housing 25, which is disposed in the middle of the air intake pipe 4.
  • the compressor impeller 22 is mounted to a turbine shaft 23, which is integrally with the turbine wheel 21. This integrally rotates the turbine wheel 21 and the compressor impeller 22.
  • the turbine wheel 21 is rotated by an energy of an exhaust gas discharged from the engine 1 and the compressor impeller 22 is rotated integrally with this rotation. Accordingly, an air sucked into the air intake pipe 4 is supercharged and is forcibly sent to a combustion chamber in each cylinder of the engine 1.
  • the air supercharged by this compressor impeller 22 is cooled by an intercooler 8.
  • the intercooler 8 is installed at the air intake pipe 4 downstream side with respect to the compressor impeller 22 in the intake airflow direction.
  • this engine 1 is equipped with a blow-by gas reducing device of Positive Crankcase Ventilation (PCV) system (reference numeral omitted).
  • This blow-by gas reducing device although not illustrated, includes a ventilation passage (illustration omitted) that flows air in the cylinder head cover into a crankcase. Airflow is generated in the crankcase via the ventilation passage.
  • the blow-by gas in the crankcase is introduced to a region downstream side in the air intake pipe 4 with respect to the air cleaner 6 and upstream side in the air intake pipe 4 with respect to the compressor impeller 22 of the turbocharger 20 via a blow-by gas passage (for example, a PCV hose) 10.
  • PCV Positive Crankcase Ventilation
  • the blow-by gas reducing device includes an oil separator (also referred to as a gas-liquid separation chamber) 11, which separates an oil in the blow-by gas to prevent an oil mixed in the blow-by gas in the crankcase from entering the air intake pipe 4, and a flow control valve (for example, a PCV valve) 12 to adjust a blow-by gas introduction quantity to the air intake pipe 4 corresponding to an intake air negative pressure.
  • an oil separator also referred to as a gas-liquid separation chamber
  • a flow control valve for example, a PCV valve
  • the oil separator 11 is interposed at a communicating and coupling portion where a crankcase (illustration omitted) is coupled to and communicates with the blow-by gas passage 10.
  • the oil separator 11 is disposed outside or inside of the engine 1. Further, the flow control valve 12 is installed in the middle of the blow-by gas passage 10.
  • the blow-by gas reducing device has a configuration that includes the ventilation passage (not shown), the blow-by gas passage 10, the oil separator 11, the flow control valve 12, and similar member.
  • an ice clump 15 is possibly formed near the coupling portion of the blow-by gas passage 10 at the air intake pipe 4.
  • moisture included in the blow-by gas may freeze near the coupling portion of the blow-by gas passage 10 at the inner wall surface of the air intake pipe 4. This moisture may grow to the large ice clump 15.
  • the ice clump 15 may collide with the compressor impeller 22 of the turbocharger 20, especially, a vane 22a of the compressor impeller 22.
  • a capture member 30 to capture the ice clump 15 is disposed in a region from the air cleaner 6 to the compressor housing 25 of the turbocharger 20 at the air intake pipe 4.
  • the region has a linear shape and is disposed laterally.
  • the capture member 30 is a filter that captures the ice clump 15 equal to or more than the predetermined size and allows the air sucked in the air intake pipe 4 to pass.
  • the capture member 30 formed of this filter for example, is a meshed plate or a meshed sheet, a large number of lamination of the meshed plates or meshed sheets, a plate-shaped matter where a fiber is tangled in a cotton state, or similar.
  • the sheet, the plate, and the fiber are preferred to be formed by a material such as a resin due to the following concerns. If the ice clump 15 or moisture contacts the sheet, the plate, or the fiber formed by a metallic material, the sheet, the plate, or the fiber is easily freezes and easily causes clogging.
  • the capture member 30 is made of resin as described above, compared with the case where the capture member 30 is made of metal as described above, coefficient of thermal conductivity is low and the capture member 30 is less likely to cool, thus the clogging is less likely to occur.
  • the filtration capability (or a mesh size) of the capture member 30 formed of this filter is specified as follows. That is, assuming that the ice clump 15 becomes gradually small with being captured by the capture member 30 and then passes through inside of the capture member 30. It is preferred to specify the size of the ice clump 15 where the ice clump 15 can pass through the inside of the capture member 30, that is, the filtration capability of the capture member 30 so as to avoid providing a negative effect to rotation performance of the compressor impeller 22 even if the passed-through ice clump 15 collides with the compressor impeller 22 of the turbocharger 20, especially, the vane 22a of the compressor impeller 22.
  • one exemplary size of the ice clump 15 that can pass through the inside of the capture member 30 may be specified as less than 10 mm x 10 mm.
  • this capture member 30 is formed in a circular plate shape.
  • the capture member 30 includes a circular hole 31 that passes through in a center axis direction (plate thickness direction) at the center portion.
  • the peripheral edge of the circular hole 31 projects toward the upstream side of the intake airflow direction.
  • This projecting portion is referred to as an annular portion 32.
  • the inventor of this application has perceived that, for example, if the ice clump 15 is formed near the coupling portion of the blow-by gas passage 10 at the air intake pipe 4 and the ice clump 15 peels off, the ice clump 15 goes along the inner peripheral surface of the air intake pipe 4 and then is transported to the downstream side. However, if the ice clump 15 is large, the ice clump 15 goes through a lower region in the vertical direction in the inner peripheral surface of the air intake pipe 4 and is transported to the downstream side. Focusing on the transport form of such ice clump 15, the center portion of the capture member 30 is not necessary to be present to reliably capture the ice clump 15. Therefore, the capture member 30 is specified as the above-described annular member.
  • a radial dimension W (see FIG. 2 ) at the annular-shaped portion of the capture member 30 including the circular hole 31 is preferred to be specified by the following viewpoints.
  • the radial dimension W is, as specifically illustrated in FIG. 2 , a dimension from the peripheral edge of the circular hole 31 of the capture member 30 to a position corresponding to the inner peripheral surface of the air intake pipe 4.
  • the radial dimension W at the annular-shaped portion of the capture member 30 can be specified such that the annular-shaped portion of the capture member 30 covers the vane 22a of the compressor impeller 22.
  • the reason for disposing the annular portion 32 at the capture member 30 is as follows. When the ice clump 15 contacts one side surface of the capture member 30 (surface at the upstream side in the intake airflow direction) and the ice clump 15 is stopped, the annular portion 32 prevents the ice clump 15 from going beyond the capture member 30 from the circular hole 31 to the downstream side.
  • moisture included in the blow-by gas may freeze near the coupling portion of the blow-by gas passage 10 at the inner wall surface of the air intake pipe 4 and grow to the large ice clump 15. If the ice clump 15 peels off, the ice clump 15 is transported to the downstream side of the air intake pipe 4 by an aerial flow sucked in the air intake pipe 4.
  • the ice clump 15 thus transported goes through a lower region in the vertical direction in the inner peripheral surface of the air intake pipe 4 and travels to one side surface of the capture member 30 (surface at the upstream side in the intake airflow direction) by swirl flow generated in accordance with the rotation of the compressor impeller 22 of the turbocharger 20. Finally, the ice clump 15 contacts the one side surface of the capture member 30 and then is stopped. This state is a captured state of the ice clump 15.
  • the annular portion 32 of the capture member 30 prevents the ice clump 15 thus captured from going beyond the capture member 30 from the circular hole 31 to the downstream side.
  • the possibility for the ice clump 15 to collide with the compressor impeller 22 of the turbocharger 20, especially, the vane 22a of the compressor impeller 22, increases.
  • the ice clump 15 becomes small as described above, even if the small ice clump 15 collides with the compressor impeller 22, especially, the vane 22a of the compressor impeller 22, it does not provide a negative effect on the rotation performance of the compressor impeller 22.
  • the ice clump 15 is prevented from colliding with the compressor impeller 22 of the turbocharger 20, especially, the vane 22a of the compressor impeller 22. This allows protecting the compressor impeller 22 of the turbocharger 20, thus achieving stable functionality of the turbocharger 20 itself for a long period.
  • the ice clump 15 formed at the air intake pipe 4 peels off, the ice clump 15 goes through the lower region in the vertical direction in the inner peripheral surface of the air intake pipe 4 and contacts the one side surface of the capture member 30 (surface at the upstream side in the intake airflow direction) by swirl flow generated by the rotation of the compressor impeller 22 of the turbo supercharger 20, and is stopped. If the ice clump 15 is large, most of the ice clump 15 goes through the lower region in the vertical direction in the inner peripheral surface of the air intake pipe 4 and is transported by its own weight.
  • the capture member 30 is not disposed at the entire circumference of the inner peripheral of the air intake pipe 4, and the capture member 30 as described above is disposed at the lower region in the vertical direction in the air intake pipe 4. Even the capture member 30 with this shape allows fully capturing the ice clump 15 formed in the air intake pipe 4.
  • the present invention is preferably applicable to an air intake structure for an internal combustion engine 1 that includes a compressor impeller 22 of a turbocharger 20 at an air intake passage (4) of the internal combustion engine 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (4)

  1. Structure d'admission d'air pour moteur à combustion interne, la structure d'admission d'air comportant:
    un impulseur (22) de compresseur d'un turbocompresseur de suralimentation placé dans un passage (4) d'admission d'air du moteur à combustion interne; et
    un élément (30) de capture placé du côté amont par rapport à l'impulseur (22) de compresseur dans le passage d'admission d'air pour capturer un amas de glace formé au niveau d'une surface de paroi intérieure du passage d'admission d'air lorsque l'amas de glace se détache,
    l'élément de capture étant configuré comme un filtre qui laisse passer à travers celui-ci de l'air aspiré dans le passage (4) d'admission d'air et empêche l'amas de glace de passer à travers celui-ci; et
    l'élément de capture étant placé de façon à s'étendre radialement vers l'intérieur à partir de la surface de paroi intérieure du passage d'admission d'air,
    l'élément de capture étant un élément annulaire comprenant un trou au niveau d'une partie centrale du passage (4) d'admission d'air, le trou passant à travers celui-ci dans la direction d'un axe central, et
    le trou comprenant un bord périphérique qui fait saillie vers un côté amont dans une direction d'écoulement d'air d'admission.
  2. Structure d'admission d'air pour moteur à combustion interne selon la revendication 1,
    l'élément (30) de capture étant constitué de matériau en résine.
  3. Structure d'admission d'air pour moteur à combustion interne selon la revendication 1 ou 2,
    un passage (10) de gaz de soufflage étant couplé au passage (4) d'admission d'air d'un côté amont par rapport à l'élément (30) de capture et étant configuré pour introduire un gaz de soufflage dans un carter du moteur à combustion interne.
  4. Structure d'admission d'air pour moteur à combustion interne selon la revendication 1,
    l'élément de capture présentant un contour en forme de diaphragme.
EP11865633.9A 2011-05-19 2011-05-19 Structure d'admission d'air pour moteur à combustion interne Active EP2713025B1 (fr)

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Publication number Publication date
US20140116403A1 (en) 2014-05-01
EP2713025A1 (fr) 2014-04-02
CN103534457B (zh) 2016-08-17
JP5626463B2 (ja) 2014-11-19
JPWO2012157113A1 (ja) 2014-07-31
EP2713025A4 (fr) 2015-03-25
US9624821B2 (en) 2017-04-18
WO2012157113A1 (fr) 2012-11-22
CN103534457A (zh) 2014-01-22

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